Starting and stopping device for motor mechanisms.



A. H. WELKER.'

STARTING AND STOPPING DEVICE FOR MOTOR MECHANISMS.

APPLICATION FILED JULY 14, 1911.

Patented July 9, 1912.

WITNESSES ALEXANDER H. WELKER, OF BERLIN, ONTARIO, CANADA.

STARTING AND STOPPING DEVICE FOR MOTOR MECHANISMS.

Specification of Letters Patent.

Application filed July 14, 1911.

Patented July 9, Serial No. 638,486.

To all 107mm 2'25 M ay concern Be it known that I, Amaraxoanll. \VEL- nna, of the town of Berlin, 'in the Province of Ontario, Canada, have invented certain new and useful ln'iprovements in Starting and Stopping Devices for Motor Mechanisms, of which thet'ollowing is a specification.

This invention relates particularly to clock-contra)llable starting and stopping devices particularly adapted for use with'clock work motor devices for actuating electric switches. fluid valves and the like at predetermined times and my object is to construct a device of that kind which will be entirely mechanical, accurate, reliable and yet simple and cheap in construction.

I attain my object by employing as the starting and stopping element proper a lever which is rockable by the controlling clock to release the controlled mechanism and which is then bodily withdrawn from norn'ial position by the controlled mechanism and then by the continued i'noven'ient of such mechanism returned to its normal position to stop further movement of the controlled mechanism, substantially as hereinafter described and illustrated in the accompanying drawings in which- I igure 1 is a front view showing my invention as applied to an electric time switch. Fig. 2 is a side elevation of part of the same. Fig. 3 is a front elevation of the. driving spindle and the spring cushioned arm carried thereby.

In the drawings like letters of reference indicate eorresrmnding parts in the ('li'tl'erent figures.

A represents a time clock of any suitable construction and I l is a rotary dial driven thereby and provided around its edge. with a series of holes (3 in which pins D may be inserted. All this is, of course, old in the art.

E represents clock-work mechanism of any suitable kind, which may be adapted to actuate an electrical switch or other part. Such devices are also well known. The parts immediately concerned of my invention are the constructions by which the pins on the dial control the starting and stopping ot the cloclework motor mechanism.

From the Hora-work mechanism E a. rotary stop arm carrier F is driven. This stop arm carrier l secured to a spindle J journaled on the frame of the apparatus and prm'ideijl with a pinion K'meshing with any suitable gear of the clock-work mechanism I On this rotary stop arm carrier F the stop arm G is eccentrically fulcrumed. The upper end of this aim normally lies in the path of the pins 1) and its lower end in the path of an arm ll carried by the rotary driven spindle I. This spindle may be driven in any suitable manner from the clock-work motor mechanism but is preferably provid ith a worm L, and this worm is driven by the rotary stop arm carrier F, the rim of which is formed. as a worm wheel for this purpose. The spindle I is preferably provided with a fly M to control its rate of movement.

Tl; coil spring N secured at one end to a stationary part and at the other end to the stop arm G tends to maintain it in position to engage the arm H. A stationaryfstep O limits its movement to insure that its lower end will be accurately in the patlrof the end of the arm N. This arm is preferably loose on the spindle I and is secured to one end of the coil spring P the other end of which is secured to the spindle. This. spring is under tension and provides a yielding backing tor the arm to ease the jar when the arm ll strikes the stop arm G. A pin Q or any other suitable means engaging the end of the coil spring keeps the latter in a state of tension.

The operation of the device is substan tially as 'tollowsrll'hen by the movement.- ot' the rotary dial ll a pin l engages the upper end of the stop arm G it gradually moves the latter until its lower end releases the arm ll. The clock-work mechanism is now tree to rotate. A t the same time the rotary stop arm carrier F is rotated and draws down the stop arm G until its upper end disengages from the pin. By the continued rotation of the stop arm carrier F the stop arm (l is returned to its normal position. but its upper nd will now be behind instead of in trout ot the pin by which it ha just been engaged. .\s soon as the arm ll rccngages the stop arm (l the clock-work mechanism is stopped. but sutlicicnt movement has been permitted to allow it to t'ultil its 't'unctiou. 'No further movement takes place until the next pin in the rotary dial ll engages the upper end of the stop arm (l. lt. is evident that the time at which the I rotary stop arm carrier geared With the driven part; a stop arm eccentrically pivoted on the said rotary carrier and adapted when in normal position to be engaged by the rotary-di' ivenpart to prevent the rotation of thelatter. p

2.1m starting and stopping mechanism the lcombination of a rotary driven part; a rotary stop arm carrier geared with the driven part; a stop arm eccentrically pivot- -ed on the said rotary. carrier and adapted when in normal position to be engaged by the rotary driven part to prevent the rotationof the latter; and a stop engageable by thestop arm to prevent the latter from rocking on its pivot in the opposite direction to that in which it is movable to disengage it from the driven part.

3. In starting and stopping mechanism? the combination of a rotary driven part; a

rotary stop arm carrier geared with the driven part; a stop arm eccentrically pivoted 'on the said rotary carrier and adapted when in normal position to be engaged by I mam the rotary driven part to prevent the rotation of the latter; a stop engageable by the prevent the latter from rock ing on its pivot in the opposite direction to stop arm to that in Which it is movable to disengage it from the driven part; and a spring tending to maintain the stop arm in contact With said stop.

4. In starting and stopping mechanism the combination of a driven spindle; a-

spring cushioned arm yieldingly carried thereby; arotarystop arm carrier geared With the driven spindle; a stop'arm eccentrically pivoted on the said rotary carrier and adapted when in normal positionto be engaged by the aforesaid arm to prevent the rotation of the spindle.

5. In starting and stopping mechanism the combination of a rotary driven part; a rotary stop arm carrier' geared with the .driven part; a stop armeccentrically pivoted on the said rotary carrier and adapted when in normal position to be engaged by the rotary driven part .to prevent the rotation of the latter; a rotatable disk; and a pin carried by said disk adapted to engage and rock said stop arm to free the driven art. A Signed at Berlin, Ont", this 13th day of June 1911.

ALEXANDER WELKER.

Signed in the presence of J. J. A. WEIR, A. B. PoLLooK.

flopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents Washington, D. O. i 

